Fiber shipping-case.



R. 'I. GIIUIEI IBERG.v

FIBER SHIPPING CASIE. APPLICATION FILED APR. I9, 1915.

Patented Dec. 5,1916;

3 SHEETS-SHEET I INVEVNTOR. RJIQfiL ENEER -I I I BY I Zg- RNEY.

WITNESSES.-

R.J.GRUENBEBG. FIBER SHIPPING CASE.

APPLICATION FILED APR.19, 1915- Patented Dec. 5, 1916.-

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R. J. GRUENBERG.

FIBER SHIPPING CASE.

APPLICATION FILED APR. 19, 1915.

; Patented Dec. 5,1916.

3 SHEETS-SHEET 3.

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.IQFUEA/ W BAOUL J'. GRUENBERG, OF SAN FRANCISCO, CALIFORNIA.

FIBER SHIPPING-CASE.

Specification of Letters Patent.

Application filed April 19,

To all whom it may concern:

Be it known that I, RAOUL J. GRUENBERG, a citizen of the United States, residing at San Francisco, in the county of San Francisco, State of California, have invented a new and useful Fiber Shipping-Case, of which the following is a specification in such full and clear terms as will enable those skilled in the art to construct and use the same.

This invention relates to an improved product formed by a die similar to that shown in Patent N 0. 1,080,759, granted Dec. 9, 1913, for the production of folding boxes and an object is to produce a folding fiber carton in moderately thick fiber board which will be cut, punched and creased with the minimum of die work and which will have its end flaps so formed that the two inner flaps press tightly against the side of the box to hold it rigid, the cutting, punching and creasing being effected in a single operation.

Another object of the invention is to provide in heavy fiber a crease of such width as to enable the fiber board of which the carton is made to be bent without injury thereto at the corners of the carton.

Another object of the invention is'to enable the. outer flaps to be turned over the inner flaps on a slightly differently located crease whereby undue strains or breaking of the material is avoided.

Another object of the invention is to so place the slits at the ends of the sheet of material of which the box is formed as to prevent the outer flaps from cutting the gummed tape used to seal the box.

Another object of the invention is to prevent the slit formed by the knives defining the end flaps from extending down the crease along the corner of the box, this effect being accomplished byturning the slit laterally at its end.

Another object ofthe invention is to avoid the necessity of removing a piece at the 7 corner of the box, thereby reducing the power consumed and pressure required on the die in the manufacture of the box.

An embodiment of the invention is shown in the drawing in which the same reference numeral is applied to the same portion throughout, but I am aware that there are many modifications thereof.

Figure 1 is a perspective view of a fiber V Patented Dec. 5, 1916.

1915. Serial No. 22,337.

carton having on end closed and having the other end partially closed, Fig. 2 is a plan view of one end of the carton showing the flaps open and illustrating the fish hook cut used to produce this carton, Fig. 3 is a horizontal sectional view of the carton illustrating the swell at the two opposite corners produced by closing the shorter flaps over the longer flaps of the carton, Fig. 4 is a plan' view of the carton with the flaps turned out to show the increased relative dimension of the inside flaps and decreased dimension of the outer flaps, Fig. 5 is a sectional view illustrating the formation of the crease at the corners of the carton. Fig. 6 is a perspective view of a slightly difl'erent shaped box from that shown in the preceding figures, cuts for the insertion of a tying cord being shown, Fig. 7 is an end view of a portion of the box shown in Fig. 6 with the flaps open, Fig. 8 is a sectional view of the box shown in Fig. 6, Fig. 9 is a view of the. end of the box shown in Fig. 6 with the flaps open and the two parts of the box collapsed upon each other, Fig. 10 is a plan view of the die used for producing the boxes, Fig. 11 is a side elevation in section of a portion of the die and cutting block, Fig. 12 is a side, elevation in section of a part of the die and cutting block showing the creasing rule just engaging the stock,

Fig. 13 is a side elevation in section of a portion of the die and block showing the die and rule down, and Fig. 14 shows a sectional view of a portion of the cutting block, knife and stock.

The numeral 1 indicates the body of the carton, said carton having flaps 2, 3, 4 and 5 at each end. The flaps at the ends of the carton are formed by making four narrow cuts 6, 7, 8 and 9 in the blank of which the carton is formed. The cuts 6 and 7 and the cuts 8 and 9 have their ends turned toward each other as indicated at 10 and 11 so that the flaps 4 and 5 along a line parallel to their folding line are as long as the outside dimension of the box, the objectbeing to the flaps 34 and 2-4 to prevent the ends of the flaps 2 and 3 from projecting over the edge of the carton and thereby cutting the sealing tape which may be used to close the 5 box. The edges of the carton or case are suitably stapled,-glued, or otherwise secured together as indicated at 14 and all of the corners are creased as indicated at 15 before the case is formed up with a crease which is wider than the thickness of the material which produces the case, the object being to produce two distinct folding lines 16 and 17 at a distance from each other, whereby the folding at each crease is only one-half the total folding where a narrow single crease is used, thereby preventing the stock from cracking.

The end creases are offset one from an- 20 other as indicated at 18v and 19, the object being to permit the end flaps 3 and4 to fold down under the end flaps 2 and 3 without straining the material, as would be the case if the two creases are exactly in line with each other. This is of particular moment in forming boxes of thick fiber board or of the well known corrugated paper board where the thickness of the walls of the box is considerable. After the fiber case is formed up as shown in Fig. 1 it may be either sealed with tape or glued as desired.

While a square box has been shown in Figs. 1 to 5 inclusive, it is obvious that the invention is applicable to any type of box, such for example as shown in Fig. 6, in which 22 and 23 indicate the top and bottom and 24 and 25 the sides of a flatter box than that shown in the preceding figures. In this figure, 26 and 27 indicate the wider end flaps while 28 and 29 indicate the end flaps which are shorter than the total width of the box. This widening of the end flaps by the use of the curved end slit is of especial ad- 45 vantage in a flat box for the reason that it gives additional strength to the wider flat sides, the edges of the flaps 26 and 27 bearing upon the fiat sides throughout the length of the flaps. In this figure the same offsetting of the folding creases 30 and 31 is found as in the previous form of the invention. This box has cuts 32 through which a tying cord may be inserted.

The die used to produce the box is shown in Figs. 10 to 14. In these figures the numeral 33 represents the die blocking, 34 to 42 indicating thin steel knives held in place by means of the blocking. Between the knives there is a series of creasing rules 43 to 59 which produoe'creases wider than the thickness of the material to be out, said rules being spaced back from the plane of the edge of the knives by an amount equal to the thickness of the board to be out. Since it may be desirableto prepare the box for being corded at the same time, the die may have a series of small knives 55 to produce cuts through which the cord may be run. These small knives may be used or not at will, the essence of the invention lying in the production of the scored and cut fiber board blank in a single operation from suitable pieces of board.

The die it will be observed from Fig. 12 stretches the material into the creasing grooves before the knives cut and hold it, the final position of the knives and rules being indicated in Fig. 13.

Having thus described my invention what I claim as new and desire to secure by Letgo ters Patent of the United States, is as follows, modifications within the scope of the claims being expressly reserved:

1. A fiber shipping box comprising a sheet of material having corner creases 35 formed therein wider than the thickness of the material of which the box is made, and having end flaps of two different dimensions, the cuts between the end flaps being so curved that their ends extend diagonally across said longitudinally extending corner creases.

. 2. A fiber shipping box comprising a sheet of fiber scored to produce the sides of a box and having flaps folded over its ends, the two inner flaps at each end being of greater dimensions parallel to their folding line than the inner dimensions of the shipping box and the two outer flaps being of less dimensions parallel to the folding line than the corresponding dimensions of the ends of the box.

3. A fiber shipping case comprising a sheet of material having scores wider than the thickness of the material and having four straight cuts with curved ends at each end of said sheet, said cuts being so placed as to extend at their inner ends diagonally across the longitudinally extending folding scores, the dimensions of each end tab parallel to its folding line being difierent from the corresponding dimension of the box side to which it is attached. V

4. A paper box having folding scores between the side wall members and the end wall members and provided with slits to produce inner and. outer closure flaps joined to the side wall members, the outer closure flaps being narrower than the side wall members to which they are joined, and the inner closure flaps being of greater dimensions parallel to their line of folding than the corresponding inner dimensions of the box and adapted to be folded entirely within the body of the box and to lie in close engagement with each of the hinges of the outer closure flaps.

5. A paper box comprising side wall sections forming the box body, said box having scores atthe junctions'of the side wall secright angles to the latter scores to form inner and outer flaps, the blank forming said box being slitted to produce the end closure flaps, said slits being offset from the box corner'scores so that the inner flaps will lie in close engagement with the hinges of the outer closure flaps, and the outer closure flaps will be of less length parallel to their folding lines than the sides of the box to which they are joined. 1

6. A paper box having folding scores between its side wall members andvend wall members and provided with slits offset from and parallel with the folding scores between the side wallmembers so as to produce inner and outer closure flaps joined to the side wall members by parallel hinges, the ofiset slits being formed without removing any appreciable amount of material of the blank so that the closure flaps of the blank abut against each other, the ends of said slits crossing the corner scores diagonally, the outer-closure flaps being narrower than the side wall members to which they are joined, and the inner closure flaps being wider than theside wall members to which they are joined so that they will tightly engage the hinges of the outer vclosure flaps.

In testimony whereof I have hereunto set my hand this 9th day of April, A. D. 1915,

in the presence of'the two subscribed wit- DGSSQS.

Mom; at GRUENBERG. 

